There is a common phenomenon in the weak current cabinet on the booster station side: the link is normal at ordinary times, but goes offline as soon as the isolation switch or circuit breaker is operated. Such signs often point to common mode interference in electrical links. Changing optical fibers is usually more effective than repeatedly adding magnetic rings.
The first thing to change is the electrical port across the cabinet and across the grounding point.
Network cables that are grounded at both ends will form a ground loop, and the ground potential difference at the moment of switch operation directly presses on the shielding layer. Symptoms include repeated link jitters, network port burnout, and occasional packet loss. Suggested judgment sequence: first check whether it crosses cabinets or buildings, then check whether the fault is aligned with the operation action time, and finally suspect the bandwidth. Cross-site locations are the most profitable part of renovation.
Four types of business that should be prioritized for glazing
- Station-side video surveillance and security images have stable bandwidth and are inconvenient to relay on site.
- The host computer side of auxiliary monitoring and acquisition links such as metering, temperature control, and SF6.
- Auxiliary control and access control, go2-way bidirectional RS485 data optical terminalCarried by separate channels.
- Duty dispatch voice, available8-way telephone + 1-way Internet phone optical transceiverConnected to the station communication room.
Transformation sequence: partition cutover and baseline recording
Divide the area first and then move the lines. One cutover only covers one cabinet group. Keep the old copper cables in parallel for a few days, and then remove them after observing if there are any errors. When laying out the cables, lay them side by side with the power cables. The crossing sections should be placed close to the wall and leave a gap. After each section is completed, measure the light intensity and record the readings before and after the operation into the same table. This will provide a benchmark for comparison if any problems arise later. You can refer to the practiceOptical isolation renovation of a 220kV substation communication networkLayered implementation records.
EB-LINK's data and telephone optical transceivers can be selected according to the number of channels. The supporting optical modules can be coded. The list of points and distances before transformation can be sent to 0755-83179002 to check the layered plan.